[Elecraft] K2 Question (after 9-year hiatus)

[Don Wilhelm]

Louis,

That is normally a result of one or more unsoldered connections or a 
poorly soldered connections on either Front Panel U1 or the LCD itself.
Check the LCD leads first - you might want to solder them from the top 
of the board if you do not see solder wicked up onto the leads.

U1 is a little more difficult since the leads are hidden by the LCD.  
The first check is on pin 1 of the socket - peer under the LCD to see if 
pin 1 is well soldered.
If the pin is not soldered, do not try to solder it from the normal 
solder side, but carve away a bit of the plastic on the socket adjacent 
to the pin and solder it from the same side the socket is mounted on.

You may be able to inspect the other U1 pins by looking between the LCD 
leads.
The "L" in Elecraft is digit 7 and the two vertical segments are "E" and 
"F", and those correspond to U1 pin 20.

73,
Don W3FPR

On 6/2/2015 11:12 AM, Louis C LaCour Jr wrote:
> Hello all:
>
> Started building a K2 back in 2005, and had to set it aside. So now I’m back at it after a LONG break. ☺
>
> Anyway….
>
> I’m at the point of first power up, and everything checks out except for one thing: I have two (vertical) LCD segments that are not lighting up (where the “L” would be in the “ELECRAFT” power-up message.”
>
> I’d appreciate suggestions on how to diagnose and correct this before I move on to other areas of assembly. I’m hoping it’s not a defective LCD unit.
>